Marabou, a renowned Swedish chocolate brand established in 1916 by Norwegian chocolatier Johan Throne Holst, has a century-long legacy of innovative marketing that seamlessly adapted to evolving media landscapes. The brand, now owned by Mondelez International, famously debuted a 20-minute commercial in 1921, showcasing its pioneering approach to long-form content when cinema was the primary entertainment. This early marketing strategy laid the groundwork for what Marabou refers to as timeless advertising principles. These enduring principles — always keeping the product in focus, maintaining distinctiveness through its iconic yellow branding, and ensuring consistency with slogans like "Mmm… Marabou" for nearly 70 years — have guided Marabou's continuous growth. The brand also demonstrated early adoption of influencer marketing, partnering with Swedish actress Yvonne Lombard in the 1950s, a collaboration that led to a 50% sales increase and introduced their famous slogan. In the 21st century, Marabou has successfully transitioned its brand world to YouTube, viewing it as the modern town square for connecting with its audience. Their "Mmm — the Champions" series, created in collaboration with popular Swedish creators, represents the contemporary evolution of their long-form content and influencer strategies. By selecting creators who genuinely align with brand values and granting them creative freedom, Marabou ensures authenticity and fosters a passionate audience. The brand's investment in YouTube has yielded impressive results, including over 100% improved efficiency in the last four years, proving that a long-game marketing approach, rooted in timeless principles and adapted for new channels, is key to sustained market leadership. This case study from Think with Google highlights Marabou's ability to identify its audience, reach them effectively, and maintain relevance across generations.